Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Mass Flow Effects to the Performance of PEMFC

고분자 전해질형 연료전지내의 질량유동이 성능에 미치는 영향

  • Park, Chang-Kwon (Dept. of Mechanical Engineering, Chonnam National University) ;
  • Jo, In-Su (Dept. of Mechanical Engineering, Chonnam National University) ;
  • Oh, Byeong-Soo (Dept. of Mechanical Engineering, Chonnam National University)
  • 박창권 (전남대학교 기계시스템공학부) ;
  • 조인수 (전남대학교 기계시스템공학부) ;
  • 오병수 (전남대학교 기계시스템공학부)
  • Published : 2007.12.15
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Abstract

Polymer electrolyte membrane fuel cell(PEMFC) is very interesting power source due to high power density, simple construction and operation at low temperature. But it has problems such as high cost, improvement of performance and effect of temperature. These problems can be approached to be solved by using mathematical models which are useful tools for analysis and optimization of fuel cell performance and for heat and water management. In this paper, the present work is to develop an electrochemical model to examine the electrochemical process inside PEM fuel cell. A complete set of considerations of mass, momentum, species and charge is developed and solved numerically with proper account of electrochemical kinetics. When depth of gas channel becomes thinner, diffusion of reactant makes well into gas diffusion layer(GDL) and the performance increases. Although at low current region there is little voltage difference between experimental data of PEM fuel cell and numerical data. When the porosity size of gas diffusion layer for PEM fuel cell is bigger, oxygen diffusion occurs well and oxygen mass fraction appears high in catalyst layer.

Keywords

References

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